and that is simply not the way science is done. science is done where you go in expecting things to be the same. we have a hypothesis. and then you try to disprove or prove something. and going in with a preconceived idea that we're going to see something is just not accurate, how science is done in a laboratory setting. >> dr. beaudet, i want to bring you back in to respond to the professor's concerns because clearly there is a danger here that if you did find something, if there was something that was in common with this young man and others, that people might be scapegoat, or they might take a look at the genetic components of different people and assume the worst where there is no propensity for them to kill. >> yes, i think that it's a very tricky area. and people could be stigmatized by having certain genetic variation. but people are stigmatized by having a diagnosis of schizophrenia as well. so we don't withhold the diagnosis of schizophrenia because it may stigmatize some people. we try to handle it in a compassionate way.